<p>A 74 year old lady was referred with a skin lesion on her upper chest. The patient was very sun-damaged and was not sure about the history of this lesion. What is the differential diagnosis?</p>
Dermoscopy - Introduction, Terminology and Structures
A document to help you understand the dermoscopic descriptions used in this blog.
Dermoscopy Algorithm
To help you work through dermoscopic cases.
<p>Clinically this could be lentiginous, or even a melanoma. However, dermoscopically the diagnosis is in keeping with a harmless <strong>ink-spot lentigo. </strong></p>
<p>There are different types of lentigines. The first clue to this being a lentigo is the brown homogenous centre with a <strong>well-demarcated edge</strong> (black arrows). Ink-spot lentigo's generally arise on <strong>UV-damaged skin</strong>, especially on the upper trunk. They are <strong>small dark brown to black macules</strong>. The most common dermoscopic appearance of an ink-spot lentigo is a <strong>monomorphic</strong> pigment network (monomorphic - meaning similar looking throughout). In this case the lesion had monomorphic scattered brown clods around the periphery (blue arrows). </p><p>Images property of South Tees NHS Foundation Trust.<br></p>
